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QoS Driven Parallelization of Resources to Reduce File Download Delay

机译：QoS驱动的资源并行化以减少文件下载延迟

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摘要

In this paper, we propose a novel approach for reducing the download time of large files over the Internet. Our approach, known as Parallelized File Transport Protocol (P-FTP), proposes simultaneous downloads of disjoint file portions from multiple file servers. P-FTP server selects file servers for the requesting client on the basis of a variety of QoS parameters, such as available bandwidth and server utilization. The sensitivity analysis of our file server selection technique shows that it performs significantly better than random selection. During the file transfer, P-FTP client monitors the file transfer flows to detect slow servers and congested links and adjusts the file distributions accordingly. P-FTP is evaluated with simulations and real-world implementation. The results show at least 50 percent reduction in download time when compared to the traditional file-transfer approach. Moreover, we have also carried out a simulation-based study to investigate the issues related to large scale deployment of our approach on the Internet. Our results demonstrate that a large number of P-FTP users has no adverse effect on the performance perceived by non-P-FTP users. In addition, the file servers and network are not significantly affected by large scale deployment of P-FTP.
机译：在本文中，我们提出了一种新颖的方法来减少Internet上大文件的下载时间。我们的方法称为并行文件传输协议（P-FTP），它建议同时从多个文件服务器下载不相交的文件部分。 P-FTP服务器根据各种QoS参数（例如可用带宽和服务器利用率）为发出请求的客户端选择文件服务器。我们的文件服务器选择技术的敏感性分析表明，它的性能明显优于随机选择。在文件传输过程中，P-FTP客户端监视文件传输流以检测慢速服务器和拥塞的链接，并相应地调整文件分布。对P-FTP进行了仿真和实际实施评估。结果表明，与传统的文件传输方法相比，下载时间至少减少了50％。此外，我们还进行了基于仿真的研究，以调查与在Internet上大规模部署我们的方法有关的问题。我们的结果表明，大量P-FTP用户对非P-FTP用户感知的性能没有不利影响。此外，文件服务器和网络不受P-FTP大规模部署的影响。

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